Diastereoselective LiAlH4 reduction of chiral ketone hydrazones derived from (R)-(–)-2-aminobutan-1-ol
摘要:
Various chiral N,N-dialkylhydrazines were prepared in four to five steps from (R)-(-)-2-aminobutan-1-ol 6. They reacted with various prochiral ketones, thus giving the corresponding hydrazones. Reduction of the latter by means of LiAlH4 afforded N,N,N'-trisubstituted hydrazines whose d.e.s were in the range 43-100%. Interestingly, LiAlH4 reduction of the four N-trifluoroethylhydrazones 34 and 38-40 yielded the hydrazines 46 and 48-50, respectively, and with d.e.s = 100% by H-1 and C-13 NMR. (C) 2000 Elsevier Science Ltd. All rights reserved.
[EN] THIADIAZOLEDIOXIDES AND THIADIAZOLEOXIDES AS CXC- AND CC-CHEMOKINE RECEPTOR LIGANDS [FR] THIADIAZOLEDIOXYDES ET THIADIAZOLEOXIDES CONVENANT COMME LIGANDS DES RECEPTEURS DES CXC- ET CC-CHIMIOKINES
3,4-Di-substituted cyclobutene-1,2-diones as CXC-chemokine receptor ligands
申请人:Schering Corporation
公开号:US20040106794A1
公开(公告)日:2004-06-03
There are disclosed compounds of the formula
1
or a pharmaceutically acceptable salt or solvate thereof which are useful for the treatment of chemokine-mediated diseases such as acute and chronic inflammatory disorders and cancer.
[EN] PYRIDINO AND PYRIMIDINO PYRAZINONES FOR TREATMENT OF ANXIETY AND DEPRESSION<br/>[FR] PYRAZINONES PYRIDINO ET PYRIMIDINO DESTINEES AU TRAITEMENT DE L'ANXIETE ET DE LA DEPRESSION
申请人:BRISTOL MYERS SQUIBB PHARMA CO
公开号:WO2004031189A1
公开(公告)日:2004-04-15
The present invention provides compounds of Formula (I): wherein the variables A, B, Ar, R1, R2, and R3 are as defined herein. The compounds of Formula (I) can function as corticotropin releasing factor (CRF) receptor antagonists and can be useful, for example, in the treatment of disorders characterized by abnormal levels of CRF such as anxiety and depression.
Synthesis, Structure−Activity Relationships, and In Vivo Evaluation of <i>N</i><sup>3</sup>-Phenylpyrazinones as Novel Corticotropin-Releasing Factor-1 (CRF<sub>1</sub>) Receptor Antagonists
作者:Richard A. Hartz、Vijay T. Ahuja、Argyrios G. Arvanitis、Maria Rafalski、Eddy W. Yue、Derek J. Denhart、William D. Schmitz、Jonathan L. Ditta、Jeffrey A. Deskus、Allison B. Brenner、Frank W. Hobbs、Joseph Payne、Snjezana Lelas、Yu-Wen Li、Thaddeus F. Molski、Gail K. Mattson、Yong Peng、Harvey Wong、James E. Grace、Kimberley A. Lentz、Jingfang Qian-Cutrone、Xiaoliang Zhuo、Yue-Zhong Shu、Nicholas J. Lodge、Robert Zaczek、Andrew P. Combs、Richard E. Olson、Joanne J. Bronson、Ronald J. Mattson、John E. Macor
DOI:10.1021/jm900301y
日期:2009.7.23
Evidence suggests that corticotropin-releasingfactor-1 (CRF1) receptorantagonists may offer therapeutic potential for the treatment of diseases associated with elevated levels of CRF such as anxiety and depression. A pyrazinone-based chemotype of CRF1receptorantagonists was discovered. Structure−activity relationship studies led to the identification of numerous potent analogues including 12p,
The present invention provides compounds of Formula I:
1
wherein the variables A, B, Ar, R
1
, R
2
, and R
3
are as defined herein. The compounds of Formula (I) can function as corticotropin releasing factor (CRF) receptor antagonists and can be useful, for example, in the treatment of disorders characterized by abnormal levels of CRF such as anxiety and depression.
Optimising metabolic stability in lipophilic chemical space: The identification of a metabolically stable pyrazolopyrimidine CRF-1 receptor antagonist
作者:Duncan C. Miller、Wolfgang Klute、Andrew Calabrese、Alan D. Brown
DOI:10.1016/j.bmcl.2009.09.016
日期:2009.11
Balancing potency and metabolic stability in a target which favours lipophilic ligands is a considerable challenge. Here we describe two strategies employed to achieve this balance in a series of pyrazolopyrimidine CRF antagonists: moderation of lipophilicity, and incorporation of a metabolically stable lipophilic group. (c) 2009 Elsevier Ltd. All rights reserved.